From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FE7CC3DA7A for ; Wed, 28 Dec 2022 15:03:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233433AbiL1PDQ (ORCPT ); Wed, 28 Dec 2022 10:03:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48064 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233486AbiL1PDH (ORCPT ); Wed, 28 Dec 2022 10:03:07 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AC3FA13CD8 for ; Wed, 28 Dec 2022 07:03:06 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 4C50C61540 for ; Wed, 28 Dec 2022 15:03:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6414EC433F0; Wed, 28 Dec 2022 15:03:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672239785; bh=feCoPiwVGAW26qPJMlAHdPzkug8f7qfVwP9ARc1bwTM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T2t0Y7bSBvZiMiSVOw0sCSLj2SOmIw7SxB01tEunAi1hXe84K7kkop7cRW0hiaMqp t+AbufpQBLhOEh5bB83BUKYDlsGQzqB4yYVSOhGJaMEIxtX3/Bk94S3YXsdoF9Grzl cj+Mzod6i9rx7/uLix5GCccuJl2QBpiL4Ad/I84I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Deren Wu , Felix Fietkau , Sasha Levin Subject: [PATCH 5.15 270/731] wifi: mt76: fix coverity overrun-call in mt76_get_txpower() Date: Wed, 28 Dec 2022 15:36:17 +0100 Message-Id: <20221228144304.400896309@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144256.536395940@linuxfoundation.org> References: <20221228144256.536395940@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Deren Wu [ Upstream commit 03dd0d49de7db680a856fa566963bb8421f46368 ] Make sure the nss is valid for nss_delta array. Return zero if the index is invalid. Coverity message: Event overrun-call: Overrunning callee's array of size 4 by passing argument "n_chains" (which evaluates to 15) in call to "mt76_tx_power_nss_delta". int delta = mt76_tx_power_nss_delta(n_chains); Fixes: 07cda406308b ("mt76: fix rounding issues on converting per-chain and combined txpower") Signed-off-by: Deren Wu Signed-off-by: Felix Fietkau Signed-off-by: Sasha Levin --- drivers/net/wireless/mediatek/mt76/mt76.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h index d1f00706d41e..4e4af6e17b50 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76.h +++ b/drivers/net/wireless/mediatek/mt76/mt76.h @@ -1021,8 +1021,9 @@ static inline bool mt76_is_skb_pktid(u8 pktid) static inline u8 mt76_tx_power_nss_delta(u8 nss) { static const u8 nss_delta[4] = { 0, 6, 9, 12 }; + u8 idx = nss - 1; - return nss_delta[nss - 1]; + return (idx < ARRAY_SIZE(nss_delta)) ? nss_delta[idx] : 0; } static inline bool mt76_testmode_enabled(struct mt76_phy *phy) -- 2.35.1